Python_py2 and Py3 Read and write text differences

The difference between Python2 and Python3?

Python 2 str corresponds to Python3 bytes

Python 2 uincode corresponds to Pyhon3 str

Py2 strings are directly 2 binary, Unicode encoding requires a front plus u

Py3 2 binary requires a front plus b

Text Read and write differences?

Py2 characters can be written directly to the file, Unicode needs to encode, then write to the file, read the file, need to decode

Py3 Open file, specify encoding format for automatic encoding, write to file without encoding and decoding

Python_py2 and Py3 Read and write text differences